Recessed spiral spline seat male pipe coupling



FIG. 1 is a top elevational view of a recessed spiral spline seat male pipe coupling showing my new ornamental design having a spiral spline seat recessed from the tapered end of the male pipe coupling providing a smooth gasket sealing surface;

FIG. 2 is a top projection view thereof showing the recessed spiral spline seat seat;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a back elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a front elevational view thereof;

FIG. 7 is a bottom elevational view thereof; and,

FIG. 8 is a bottom perspective view thereof. 

The ornamental design for a recessed spiral spline seat male pipe coupling, as shown and described. 